Furnace



\Nov. 11, 1930. J. F. SHELTON 1,780,984

FFFFF CE Filed March 28. 1929 2 Sheets-Sheet 1 WITNESSES w I J Zi gy?! STHQMG i? a 0/2.

* M22? 8 M g Nov. 11, 1930. J. F. SHELTON 1,780,934

FURNACE Filed March 28, 1929 2 Sheets-Sheet 2 7W7 KW v jgmg Patented Nov. 11, 1930 N TE STATES, P TENT on-1C A A I JACK FENNER snnnroivgonnnivrrnis,'rnnnnssnn FURNACE v Application filed March 28,

This invention relates to furnaces.

An object of the invention'is the provision of a furnace having a centrally disposed hot air conduit and air passages located in 6' embracing relation with the central conduit with the passages and the central conduit being separated from each'other by a heating shell or casing through which hot gases are passed by a tortuous path with the heating 10, shell having angularly disposed heat-radiating fins disposed exteriorly and interiorly of the shell and in open communication with said shell. a

Another object of the invention is the'pro- 1:5 vision of a. furnace having a plurality of hot air passages which are heated by a hollow shell through which gases evolved from an oil burner or from acoal grate are conducted, said passages being disposed in heat exchange relation with the shell, a spiral/tubular passage or conduit being connected with a discharge pipe and withthe hollow shell, a valve being employed for controlling the passage of the hot gases from the hollow shell to the usual chimney or to thespiral conduit. f

A further object of'the invention is the provision of a furnace having a burner for producing hot gases which are conducted into a heatingshell located centrally of the 3 0 furnace by means of a spirally arranged conduit, aheader being in communication with the hollow shell and with one end of the conduit, a valve being employed for controlling the admission of the gases directly to the header or to the usual chimney, said shell having hollow fins in close association with the spirally arranged conduit.

A still furtherobject of the invention is the provision of a furnace formed of an outer 140' shell or casing composed of a plurality of walls, a pair of'opposed'walls haying right angularly disposed flanges adapted to be received within longitudinally disposed grooves formed at theopposite edges of the 4 other side walls, whereby theffirst-mentioned 7 side walls may be readilyremove d from the last-mentioned side walls.

This invention will be best understood from a consideration. of the following de- 59 --tailed description, in view, of the accompany- 1929'. Serial No. 350,696.

ing drawings; nevertheless it is to be under stood that the invention is not confined to the disclosure, beingsus'ceptible of such; changes and modifications which shall define no ma terial departurefrom the'salient features of the invention as expressed in the appended l ms- In the drawings: V Figure 1 is a view in perspective constructg ed in accordance with the present'invention,

1 Figure2 is a view in perspective of the inner heating shell ofthe furnace, --1 "1 Figure 3v isavertical section taken along the line 3+3 .o-f Figurepand zl igure 4 is a horizontal section taken" along thenne of Figure 7 Referring more particularly to the draw-= ings, 1O generally designates anfouter shel'l of'a furnace which is 'composedjof a-pair of side walls 11, and 12,'a front wall13' and a rear wall 1&5 The side walls have their vertical edges turned laterally at an angle to proyide fianges lt'rwhich are adapted'to be re,ceived"'within sockets. formed by'bendi'ng the side edges of the front and rear walls intota U-shaped member 16. By this construction the side walls 11 and '12 may be readily and removably connected to the edges of'the frontand rear wall by causing the Y flanges 15 to slide into the sockets formed by the U-shaped ine mb'er'16,

' Resting upon the upper edges'ofthe side wal-ls, the front and rear walls, isa top or closure 20, having openings 21 which 3 are adapted to receive air pipes 22 securedto the outer surfaces of the top '20 by means, of flanged rings .or collars 23. The space formed bythe top 20 is adapted to provide a hot air chamber from Whichthe air is conducted by means ofthe pipes 22 to the various rooms of a building; which is adapted to be heated by the furnace. a i c 1 k centrally disposed heating shell, generallydesignated by the numeral 30 and shown more particularly in Figure 2 as a unit, consists of an outer casing 31' and an inner casing 32. The, outer casing is pro- 'vided with a plurality of vertically disposed 34 into WlllCllllOt gases are conducted from.

' :.-an oil burner, generally designated by the 39 are triangular in cross s'ection, These cor- .casing 32.1 g I v p H The bottom and top of the shell 30 are closed asindicatedat 41 and :42, "Therpjer- '1 foratedgbafiles 43* are located in spaced rela T2 fiion within-the chamber-13,4: oi the fshell30 f and further ai'd;inprovidingatortuous'path rugationsforlribs 33 and 39form additional radiating surfaces for the z-hollow shell and v aroundwhich' and'thro' igh Which the hot air I trflifelsflwhen being heated before. it enters the chamber in thet'op of theiurnacefi An I f; airfl efi'o is' locatd oen trally'of the Shell and is formed by theribbedwa lls of the inner for theahotj gases entering the chambe'rfifl for aiding in r'adia tlingiflthe heat to the ribs'ior- :7 corrugations 33 and 39.: Thetop andbottom 'members 41 and 42, respiectiyely are securely v sealed to the top'vr'a nd-bot'tom edges of the partitions-31 and 32: in order to pre ent vthe o i, escape of the ggasesflfrom the; heating Vappait ratusto; the hot air passing through the flue 4O and'through the space fl5 in thegouterr shell or-casing 10."

. plurality of partitions and.

located within the space45 and extendyer V ticallyy of the furnace' and are connected with the outer'walls of the shell lO and with the outer partition 31 of theinner shell 30; These partitions provide channels for the passage 7 of air from thebottom of the furnace' to the storage chamber 20. I

" A spiral conduit, generally designated by thefnumeral 50, is connected through its 7 lower end by :meansof a conduit 51'to a header r 52 which is 'in'open icommunicationiwith the chamber 340 35 the central-shell30.v .The'oppoa site or upper end 53 of the spirallyarrangedconduit is connected with an outlet pipe 54 I whereby theexhaust gases from the burner are conductedto the usual chimney. Avalve i 55 islocated in the. conduit 54 between the upper terminous of the spiral :conduit' andthe header 52 so thatwheii the valv is closed the exhaust gases frorn the jchamber i i 34 which have entered thei'header are passed, downwardly through theyertical "p'or- ,tion 51 otthe conduit'5O and thenaround the 7 7 'sp'ir'al conduit and willbevdischarged into the r haustconduitfii Howeyer, wh i l e 55.1 openthe greater portion of the exhaust Q gases-from the 'cll ftmbe r will pass directly th'roughthefurnace? V x through the header andthrough the discharge conduit 54L to the chimney.

The burner casing 35 is in direct communi-i ocation at its inner end with the chamber 34 {I r so -that the gases of combustion o-feither an oil; burner'or of-a coalgrate will pass'directly linto the chamber 34-:at its lower end and through the perforated baffles 43; thence' through the header 52, after which it will be Conduc d-arou dil e gh i Spiral n duit 52 or directly through the discharge con- "duitifil, depending upon theposition of the l 1 Valve 55; 7 V g V I A d0or' 60 is adapted to normally close an openingor passage leading into the burner chamber d An opening "Gliformed: one 1 7 "side wall 'orjinboth side walls'is'adapted to,

permit air to enter the 'cha'mber 45 of the out- 1 er jcas'ingl or shell l0 whence it will be c'onducted through the saidchamberiand through the'central conduit 40 where itis hidduring its passagethrough the said chamber and flue be o n rs ihe'st'o agej hamber 20.; A metal bracket 65 resting' lpbli thejfloorfifi is adapted to support the; lower end jof the g5 ner shell, '30.

Theoperation joi iny 'cleyice 1 Theheat is producedeither by neansf'ofia" coal grate orprefe'rablyby an oil or gasfburner located within the casing 35.. Si'ncc'this casing isin direct contactwith thechambelr' 34P in the'inneri shell 30 tl1ega'sesofjcombustion I will enter said; chamberand pass, upwardly against'the bafllesg4l3 an'd'throughithehollow ribs33 and 39 while'heating said surfaces."

Air which hasfl'entered the opening 61 will pass upwardly "and in close association with the side Wallsof the inner shell 30 a'tndpar-"I- ticu'larlyin close-association withthe'hollow' ribs 33 and the ribs 39. The air also passes j through the centralflueor'con'duit 4:0 and in this connection it "willbenotedthat the par titions gleam-1 'ifco-ope'rate witlrthe. hol-f ;'ribs '33 and 39 for radi'ating the heat to the air which'ipasses through theturnace;

; When it is desiredtofincrease the heating capacity of the furnace the valve 55is closed, whencethe hot exhaust gases frorn'the chain- 'ber 34 ,will pass downwardly through t e; pipe 51jand then'cebe conducted through the spiral member 50 before said gases are clischarged into the dischargepipe 54. In this manner heatnot only fro'mthe inner shell 30 but the heated spiralconduit 50' will act to raise the temp'erature of thel air passing.

I claimed.

furnace comprising ,an outershell, an

* nner hollow {shell 1 haying'fa passage there? i ,througlr forhot air,'a combustion chamberin communication with the outer shell, 7 a dis eh argeep1peconnectedwith, the. outer shell spiral 'tub ng having one: end in communica tion. with theouter. shell "and the other end v-1 connected tofthe'dischar'ge pipe. I by iii 2. A furnace comprising an outer shell, an inner hollow shell having a passage therethrough for hot air, a combustion chamber in communication with the outer shell, a discharge pipe connected with the outer shell, spiral tubing having one end in communication with the outer shell and the other end connected to the discharge pipe, and a valve for controlling the circulation of gases through the spiral tubing.

3. A furnace comprising an outer shell, an inner hollow shell having a passage therethrough for hot air, a combustion chamber in communication with the outer shell, a discharge pipe connected with the outer shell, spiral tubing having one end in communication with the outer shell and the other end connected to the discharge pipe, and a valve in the discharge pipe for causing circulation of combustion gases through the spiral tubing.

4. A furnace comprising an outer shell, an inner hollow shell having a passage therethrough for hot air, a combustion chamber in communication with the outer shell, a discharge pipe connected with the outer shell, a header in open communication with the outer shell, the discharge pipe being connected with the header, a spiral tubing having the lower end thereof connected to the header and encircling the outer shell, the other end of the tubing being in communication with the discharge pipe.

5. A furnace comprising an outer shell, an inner hollow shell having a passage therethrough for hot air, a combustion chamber in communication with the outer shell, a discharge pipe connected with the outer shell, a header in open communication with the outer shell, the discharge pipe being connected spiral tubing having one end in communication with the outer shell and the other end connected to the discharge pipe, and a valve inthe discharge pipe for causing circulation V of exhaust'gases through the spiral tubing,

hollow ribs projecting from and in communication with the outer shell, said ribs acting to space thespiral tubing from the outer walls of said shell.

v 8. A furnace comprising an outer shell, an inner hollow shell having a passage therethrough for hot air, a combustion chamber in communication with the hollow shell, a

discharge pipe connected with the hollow support the spiral tubing.

SHELTON.

JACK FENNER with the header, a spiral tubing having the I lower end thereof connected to the header and encircling the outer shell, the other end of the tubing being in communication with the discharge pipe, and a valve in the discharge pipe for causing circulation of the exhaust gases through the spiral tubing. I

6. A furnace comprising an outer shell, an inner hollow shell having a passage .therethrough for hot air, a combustion chamber in communication with the outer shell, a discharge pipe connected with the outer shell, a header in open communication with the outer shell, the discharge pipe being connected with the header, a spiral tubing having the lower end thereof connected to the header and encircling the outer shell, the other end of the tubing being in communication with the discharge pipe, the header being connected to the upper end of the outer shell.

7. A furnace comprising an outer shell, an inner hollow shell having a passage therethrough for hot air, a. combustion chamber n communication with the hollow shell, a discharge pipe connected with the hollow shell, 

